sc46 billet too laggy???
14 August 2013, 08:59 PM
#1
sc46 billet too laggy???
hi folks
at the mo ive got a md t on my 05sti. im thinking of getting it billet for better spool.
or do I sell the t for a sc 46 billet? would this be too laggy on a 2ltre? or would the t billeted make a better turbo for my car?
at the mo ive got a md t on my 05sti. im thinking of getting it billet for better spool.
or do I sell the t for a sc 46 billet? would this be too laggy on a 2ltre? or would the t billeted make a better turbo for my car?
14 August 2013, 09:30 PM
#3
Hi Craig, the MDX321T is a much quicker spooling turbo than the 46. My MDX was an MD originally & although it's pricey to upgrade it is worth it. Don't just go for the billet wheel, you need the housing too. Mine is a 2L & no noticeable lag atall, usable power always on tap without dropping two gears. The 46 is good but best on a 2.5, even ScoobyClinic recommend the 42 on a 2L rather than a 46. On a Meth mix one or two 42s have reached over 500 on 2L engines.
14 August 2013, 09:51 PM
#5
Oh yes. The power kicks in much lower down the revs & just keeps pulling. Mine drives great since Simon mapped it to 450, but as I made a schoolboy error & didn't fit a 3 bar map sensor Im having Simon fit one in September & having a map tweak for more boost & a bit more power. I'd recommend you go for it, the uprated unit looks like a new one, infact I think they only reuse the exhaust housing & it comes with a 1 year warranty.
14 August 2013, 09:55 PM
#6
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The SC 46 on my 2L WR1 came in around 4200 and was in full swing by 4650rpm. Work the 6 speed box and you can keep it in the power band. Was brutally fast once on full chat though.
On my 2.5L engine the SC 46 comes in a bit earlier so is on full chat by 4000rpm. So its definitely less laggy on a 2.5L but i have enjoyed it on both engines.
On the 2L my last turbo was TD05 20g and the SC46 spooled quicker on my 2L than that but I never tried the MD range so cant comment. The best person to tell you would be mappers who regularly see where the power comes in with which turbo
On my 2.5L engine the SC 46 comes in a bit earlier so is on full chat by 4000rpm. So its definitely less laggy on a 2.5L but i have enjoyed it on both engines.
On the 2L my last turbo was TD05 20g and the SC46 spooled quicker on my 2L than that but I never tried the MD range so cant comment. The best person to tell you would be mappers who regularly see where the power comes in with which turbo
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15 August 2013, 07:49 PM
#10
Hi Craig, the MDX321T is a much quicker spooling turbo than the 46. My MDX was an MD originally & although it's pricey to upgrade it is worth it. Don't just go for the billet wheel, you need the housing too. Mine is a 2L & no noticeable lag atall, usable power always on tap without dropping two gears. The 46 is good but best on a 2.5, even ScoobyClinic recommend the 42 on a 2L rather than a 46. On a Meth mix one or two 42s have reached over 500 on 2L engines.
I'm interested in your comments regarding the housing, is this smaller or larger for the billeted conversion?
I fitted a billeted T which started life as a standard MD and just had the billet wheel fitted. It outspools by 400rpm the H which was on there previously but oddly makes less power, these are only RR numbers as on the road it has withering pace. This is on a 2.5. Any thoughts?
Trev
15 August 2013, 07:56 PM
#11
Scooby Regular
I'm confused as I thought the SC46 and MD321T were the same size of turbo in relative terms.... they have both made around 450bhp on a 2ltr, which again is virtually the same as a LM450 Billet.
Good choice on getting your original turbo modded...... much cheaper and you'll end up netting similar results than changing the turbo entirely.
Good choice on getting your original turbo modded...... much cheaper and you'll end up netting similar results than changing the turbo entirely.
15 August 2013, 08:06 PM
#12
Hi Richard,
I'm interested in your comments regarding the housing, is this smaller or larger for the billeted conversion?
I fitted a billeted T which started life as a standard MD and just had the billet wheel fitted. It outspools by 400rpm the H which was on there previously but oddly makes less power, these are only RR numbers as on the road it has withering pace. This is on a 2.5. Any thoughts?
Trev
I'm interested in your comments regarding the housing, is this smaller or larger for the billeted conversion?
I fitted a billeted T which started life as a standard MD and just had the billet wheel fitted. It outspools by 400rpm the H which was on there previously but oddly makes less power, these are only RR numbers as on the road it has withering pace. This is on a 2.5. Any thoughts?
Trev
1 is just the wheel which gives more power.
2 is new smaller wheel which needs new housing and also new actuator which is for spool.. this is the one im going for
15 August 2013, 08:07 PM
#13
I'm confused as I thought the SC46 and MD321T were the same size of turbo in relative terms.... they have both made around 450bhp on a 2ltr, which again is virtually the same as a LM450 Billet.
Good choice on getting your original turbo modded...... much cheaper and you'll end up netting similar results than changing the turbo entirely.
Good choice on getting your original turbo modded...... much cheaper and you'll end up netting similar results than changing the turbo entirely.
15 August 2013, 08:21 PM
#15
Craig has pretty much explained it. The MDX is the latest generation of Laterals turbos & has more power aswell as better spool. To make an MD into an MDX you need the housing as the wheel & shaft size are different & it's not a cheap upgrade but well worth it. A billeted MD just has a billet wheel fitted & is a good upgrade but not an MDX conversion.
15 August 2013, 08:30 PM
#16
Craig has pretty much explained it. The MDX is the latest generation of Laterals turbos & has more power aswell as better spool. To make an MD into an MDX you need the housing as the wheel & shaft size are different & it's not a cheap upgrade but well worth it. A billeted MD just has a billet wheel fitted & is a good upgrade but not an MDX conversion.
15 August 2013, 08:31 PM
#17
Craig has pretty much explained it. The MDX is the latest generation of Laterals turbos & has more power aswell as better spool. To make an MD into an MDX you need the housing as the wheel & shaft size are different & it's not a cheap upgrade but well worth it. A billeted MD just has a billet wheel fitted & is a good upgrade but not an MDX conversion.
Trev
15 August 2013, 08:33 PM
#18
15 August 2013, 09:34 PM
#24
I think it's a little more than that, I'll check my invoice tomorrow, but it's still great value compared to a new one. They take your old housing & actuator on an exchange basis, not sure what they do with them, but I believe that keeps the cost down.
16 August 2013, 07:52 AM
#26
Scooby Regular
Depends what you're comparing it to Shaun of course, as well as remembering that not all spool associated issues are necessarily the fault of the turbo.
From the stock engined SC46 equipped Stis I've done, it certainly isn't typical for them to be as late as 5000rpm to peak torque.
Kev quite rightly recommends the 42 for stock engined cars as it'll make almost as much power but with better mid range.
From the stock engined SC46 equipped Stis I've done, it certainly isn't typical for them to be as late as 5000rpm to peak torque.
Kev quite rightly recommends the 42 for stock engined cars as it'll make almost as much power but with better mid range.
18 August 2013, 10:30 PM
#28
19 August 2013, 06:29 AM
#29
yeah live in Mansfield. simon just meeting m there and doing it on rd. as still got a issue with map sensor. and at rcm the inlet pipe collapsed at 1.6 bar. so also having perrin inlet pipe fitted. hopefully ill be all good then
19 August 2013, 07:31 PM
#30
Should be good when it's all done. I'm in Bingham not far from you. Simons doing mine again in September as I now need a 3 bar map sensor to go further & the Alcatec cal switch wouldn't work so Simons going to sort that too. Not decided wether to do it on the RR yet or just have it road mapped. Let me know what you think of the MDX when it's all mapped, I'm sure you'll love it.